Writing a function from within Python

[Arnaud Delobelle]

Aaron Scott <aaron.hildebrandt at gmail.com> writes:

> Is it possible to change the content of a function after the function
> has been created? For instance, say I make a class:
>
> 	class MyClass:
> 		def ClassFunction(self):
> 			return 1
>
> And I create an object:
>
> 	MyObject = MyClass()
>
> Is there any way to change the content of the function, a la pseudo-
> code:
>
> 	MyObject.ClassFunction = "return 2"

Yes there is:

>>> class Foo(object):
...    def __init__(self, x):
...        self.x = x
...    def bar(self):
...        return self.x
... 
>>> foo = Foo('spam')
>>> foo.bar()
'spam'
>>> from types import MethodType
>>> def newbar(self):
...     return self.x + ', yummy!'
... 
>>> foo.bar = MethodType(newbar, foo)
>>> foo.bar()
'spam, yummy!'


HTH

-- 
Arnaud